CBS today announced premiere dates for its two scripted summer event series – UNDER THE DOME and EXTANT, both produced by Steven Spielberg’s Amblin Television.

UNDER THE DOME returns for its sophomore season on Monday, June 30 (10:00-11:00 PM, ET/PT). The premiere episode will be written by Stephen King, whose bestselling novel the series is based on. UNDER THE DOME was last summer’s #1 program, averaging 15.06 million viewers and 3.9/11 in adults 18-49, ranking as the most-watched scripted summer series in 21 years.

UNDER THE DOME tells the story of a small town that is suddenly and inexplicably sealed off from the rest of the world by an enormous transparent dome. The town’s inhabitants must deal with surviving the post-apocalyptic conditions while searching for answers to what this barrier is, where it came from, and if and when it will go away.

EXTANT is a mystery thriller about a female astronaut trying to reconnect with her family when she returns after a year in outer space. Her experiences lead to events that ultimately will change the course of human history.

EXTANT is a co-production of CBS Television Studios and Amblin Television. Steven Spielberg, Greg Walker, Mickey Fisher, who wrote the script, Brooklyn Weaver, Justin Falvey and Darryl Frank will serve as executive producers. Halle Berry will serve as co-executive producer. The series will be distributed domestically by CBS Television Distribution and worldwide by CBS Studios International.

it ended with too many ? unanswered. 2nd season came across as if it were the the 3rd or 4th episode. please give us some answers as to why the dome is there and an ending with some answers, or at least tie some strings together.